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  • Irish Chronicles Document Links Between Volcanoes and Weather
    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong corr...Read more

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    Irish Chronicles Document Links Between Volcanoes and Weather

    A study of over 40,000 written entries in Irish Annals and ice core measurements shows a strong correlation between the occurrence of volcanic eruptions and extreme cold weather in Ireland over a 1200 year period. Data analyzed in this study cover the period from 431 to 1649, during which time up to 48 volcanic eruptions are identified in Greenland ice core records through deposition of volcanic sulfate in annual layers of ice. You can find the study (open access), published on 6 June 2013 in IOP Publishing's journal Environmental Research Letters, at http://iopscience.iop.org/1748-9326/8/2/024035/article. Find out more about how volcanoes can influence climate.
  • EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US
    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, acco...Read more

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    EF-5 Tornado in El Reno, Oklahoma Widest Ever Recorded in US

    The EF-5 tornado that hit El Reno, Oklahoma on May 31st was the widest ever recorded in the US, according to the National Weather Service in Norman Oklahoma. The tornado, which remained on the ground for 40 minutes and reached 2.6 miles across (4.2 km), took the lives of 18 people including storm chasers Tim Samaras, Paul Samaras and Carl Young. For more information on the tornado, visit http://ow.ly/i/2hfDG.
  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
Valles Marineris, from the Viking orbiter of 1976. Viewing of this image in high resolution is recommended
Click on image for full size
Image from: NASA/JPL

The Exploration of Mars

Russia and the United States have been sending spacecraft to Mars since 1960! Some of the coolest missions were Mariner 4, 6, 7, & 9, Mars 2, 3, 4, 5, & 6, the Viking missions, and the Mars Global Surveyor mission.

You may remember the Mars Pathfinder lander and rover that landed on Mars in 1997. The rover bumped into rocks named Scooby Doo, Shark, Pooh Bear and Chimp!

In April 2001, the 2001 Mars Odyssey was launched. It got to Mars in October 2001. The European Space Agency sent the Mars Express mission to the Red Planet. It reached Mars on Christmas day in 2003. Mars Express also had a small lander called the Beagle 2. NASA launched two Mars Exploration Rovers in June and July of 2003. They have been driving around on Mars since January 2004. Mars Reconnaissance Orbiter is another satellite that is mapping Mars from orbit. It was launched in August 2005 and made it to Mars in March 2006.

The Phoenix Mars Lander was launched in August 2007. It will land near the North Pole of Mars in May 2008. Phoenix will use a robotic arm to dig up samples of Martian soil. Scientists hope Phoenix will find water ice just below the surface.

What about the future? NASA is sending another, bigger rover to Mars in 2009. It is called the Mars Science Laboratory. Some day we may send airplanes or balloons to roam the Martian skies. We might send a drilling rig to search for water and maybe signs of life underground. Scientists also hope a there will be sample return mission some day. It would bring Mars rocks back to our planet so scientists could study them in laboratories on Earth.


Last modified May 20, 2008 by Randy Russell.

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